EP0579645B1 - Dispositif d'enregistrement et/ou de reproduction de signaux d'images - Google Patents

Dispositif d'enregistrement et/ou de reproduction de signaux d'images Download PDF

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Publication number
EP0579645B1
EP0579645B1 EP92907660A EP92907660A EP0579645B1 EP 0579645 B1 EP0579645 B1 EP 0579645B1 EP 92907660 A EP92907660 A EP 92907660A EP 92907660 A EP92907660 A EP 92907660A EP 0579645 B1 EP0579645 B1 EP 0579645B1
Authority
EP
European Patent Office
Prior art keywords
chrominance
carrier
accordance
additional information
luminance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92907660A
Other languages
German (de)
English (en)
Other versions
EP0579645A1 (fr
Inventor
Martin Plantholt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Thomson Brandt GmbH
Original Assignee
Deutsche Thomson Brandt GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Publication of EP0579645A1 publication Critical patent/EP0579645A1/fr
Application granted granted Critical
Publication of EP0579645B1 publication Critical patent/EP0579645B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/007—Systems with supplementary picture signal insertion during a portion of the active part of a television signal, e.g. during top and bottom lines in a HDTV letter-box system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/7904—Processing of colour television signals in connection with recording using intermediate digital signal processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
    • H04N9/7925—Processing of colour television signals in connection with recording for more than one processing mode for more than one standard
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/797—Processing of colour television signals in connection with recording for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
    • H04N9/831—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal using intermediate digital signal processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
    • H04N9/832—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal using an increased bandwidth for the luminance or the chrominance signal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S348/00—Television
    • Y10S348/913—Letterbox, e.g. display 16:9 aspect ratio image on 4:3 screen

Definitions

  • the color carrier frequency f sc can be obtained in a known manner from the transmitted burst signal.
  • the required phase position of f sc ' which must correspond to the modulation phase of the additional information, is brought about via a phase shifter 44.
  • the undesired modulation products of the upper sideband that arise during demodulation are separated off in a subsequent low-pass filter 43.
  • These low-pass filters should limit the baseband of the additional information obtained to frequencies up to the color carrier frequency.
  • the output signal of the low pass filter is fed to a first input 1 of the video switching device 49.
  • the complete demodulation process can be undone by appropriate modulation and renewed conversion of the modulated additional information into the Ultra Black area.

Abstract

Un format d'image ou écran large 16 : 9 est introduit de façon compatible dans des standards de télévision avec le format 4 : 3, selon le procédé 'boîte aux lettres'. Selon ledit procédé, l'information d'images 16 : 9 est représentée sur des récepteurs 4 : 3 avec des bandes noires en haut et en bas de l'image. Pour obtenir une représentation plein format sans avoir une résolution réduite sur un récepteur 16 : 9, des informations complémentaires sous la forme d'une modulation de bandes latérales résiduelles de la sous-porteuse de chrominance peuvent être transmises dans les lignes se trouvant dans les bandes noires. Dans l'article intitulé 'Adaptive Luminanz-Chrominanz-Trennung mit underschiedlich farbträgerverkoppelten Sampling-Phases' (Séparation adaptive luminance-chrominance à l'aide des phases d'échantillonnage à couplage de la sous-porteuse de chrominance différent' signé R. Schweer, M. Plantholt, et publié dans Fernseh- & Kinotechnik 12/1990, un circuit intégré à filtre à peigne servant à la séparation luminance/chrominance est décrit. Un décodeur numérique à filtre à peigne ayant subi des modifications adéquates peut être utilisé avec ce circuit intégré pour démoduler des informations complémentaires de signaux 'boîte aux lettres' couleurs composites pour préparer un enregistrement de toutes les composantes de tels signaux 'boîte aux lettres' à l'aide d'un magnétoscope S-VHS ou Hi8.

Claims (9)

  1. Dispositif pour l'enregistrement et/ou la reproduction de signaux vidéo, comportant un circuit (20, 21) disposé en amont d'une entrée du signal de luminance (Y) et une entrée des composantes de chrominance (C), lequel est en mesure de décomposer les signaux complets de chrominance (FBAS), appliqués à son entrée FBAS, en signaux de luminance et de chrominance au moyen d'un filtre adaptateur de signaux (24) et d'un décodeur numérique de chrominance (27) pour la sous-porteuse couleur ; ledit circuit (20, 21) étant utilisé pour démoduler en numérique, au moyen dudit décodeur de chrominance (27), les informations additionnelles modulées sur la sous-porteuse couleur des signaux complets de chrominance appliqués à l'entrée (FBAS) en format "letterbox", et de transmettre les informations additionnelles démodulées à l'entrée du signal de luminance (Y) dudit dispositif durant les lignes dans les bandes du format "letterbox".
  2. Dispositif selon la revendication 1 caractérisé en ce que le signal complet de chrominance appliqué à l'entrée (FBAS) est balayé dans ledit circuit (20, 21) à la quadruple fréquence porteuse de couleur.
  3. Dispositif selon l'une quelconque des revendications 1 ou 2 caractérisé en ce que la sous-porteuse couleur comportant des informations additionnelles est balayée dans le décodeur de chrominance (27) à la double fréquence porteuse de couleur, et qu'une onde porteuse de couleur y est générée dont la position de phase de balayage correspond à la phase de modulation côté émetteur de ladite onde porteuse de couleur.
  4. Dispositif selon l'une quelconque ou plusieurs des revendications 1 à 3 caractérisé en ce que, dans le décodeur de chrominance (27), les phases de balayage sont déduites du signal de chrominance et fournies par l'intermédiaire d'un maître-oscillateur PLL.
  5. Dispositif selon l'une quelconque ou plusieurs des revendications 1 à 4 caractérisé en ce que ledit circuit (20, 21) comporte un filtre de Nyquist (41) dont le point de 6dB est proche de la sous-porteuse couleur et qui sert à filtrer les informations additionnelles modulées sur la sous-porteuse couleur.
  6. Dispositif selon la revendication 5 caractérisé en ce que les composantes de luminance des signaux complets de chrominance comprises dans les lignes en dehors des bandes du format "letterbox", sont filtrées à l'aide du filtre de Nyquist (41) avant leur balayage au niveau du convertisseur analogique-numérique (21).
  7. Dispositif selon l'une quelconque ou plusieurs des revendications 1 à 6 caractérisé en ce que ledit décodeur de chrominance (27) effectue également une élévation de l'amplitude.
  8. Dispositif selon l'une quelconque ou plusieurs des revendications 1 à 7 caractérisé en ce que, lors de l'enregistrement, les informations additionnelles démodulées subissent une élévation de leur niveau de tension continue dans ledit circuit (20, 21).
  9. Dispositif selon l'une quelconque ou plusieurs des revendications 1 à 8 caractérisé en ce qu'il est associé à un magnétoscope, et notamment un magnétoscope S-VHS ou Hi8.
EP92907660A 1991-04-12 1992-04-04 Dispositif d'enregistrement et/ou de reproduction de signaux d'images Expired - Lifetime EP0579645B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4111979A DE4111979A1 (de) 1991-04-12 1991-04-12 Vorrichtung zur bildsignal-aufzeichnung und/oder -wiedergabe
DE4111979 1991-04-12
PCT/EP1992/000759 WO1992019075A1 (fr) 1991-04-12 1992-04-04 Dispositif d'enregistrement et/ou de reproduction de signaux d'images

Publications (2)

Publication Number Publication Date
EP0579645A1 EP0579645A1 (fr) 1994-01-26
EP0579645B1 true EP0579645B1 (fr) 1995-08-16

Family

ID=6429458

Family Applications (2)

Application Number Title Priority Date Filing Date
EP92105855A Pending EP0508333A1 (fr) 1991-04-12 1992-04-04 Dispositif pour l'enregistrement et/ou la reproduction d'un signal d'image
EP92907660A Expired - Lifetime EP0579645B1 (fr) 1991-04-12 1992-04-04 Dispositif d'enregistrement et/ou de reproduction de signaux d'images

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP92105855A Pending EP0508333A1 (fr) 1991-04-12 1992-04-04 Dispositif pour l'enregistrement et/ou la reproduction d'un signal d'image

Country Status (7)

Country Link
US (1) US5517252A (fr)
EP (2) EP0508333A1 (fr)
JP (1) JPH06506576A (fr)
DE (2) DE4111979A1 (fr)
ES (1) ES2078040T3 (fr)
HK (1) HK113396A (fr)
WO (1) WO1992019075A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4339845A1 (de) * 1993-11-24 1995-06-01 Thomson Brandt Gmbh Verfahren zur Messung von Übertragungskanälen für PALplus-Fernsehsignale
DE4428299A1 (de) * 1994-08-10 1996-02-15 Thomson Brandt Gmbh Videorecorder mit zusätzlicher Aufzeichnung eines PALplus-Helpersignals
KR100317351B1 (ko) * 1994-12-07 2002-02-19 구자홍 팔프러스티브이의직류오프셋보상회로
DE69609163T2 (de) * 1995-12-11 2001-03-08 Koninkl Philips Electronics Nv Video- und/oder audiosignalmarkierung
DE19649408C2 (de) * 1996-11-28 2000-12-21 Siemens Ag Schaltungsanordnung zur Analog-Digital-Wandlung
US20020186769A1 (en) * 2001-06-12 2002-12-12 O'brien Royal System and method for transcoding
WO2011103075A1 (fr) 2010-02-22 2011-08-25 Dolby Laboratories Licensing Corporation Diffusion et commande vidéo en écrasant des données vidéo

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4119999A (en) * 1977-01-28 1978-10-10 Ampex Corporation Apparatus for inserting a digital sync word, phase-synchronized to the color subcarrier, in place of the horizontal sync signal
US4879606A (en) * 1988-06-06 1989-11-07 General Electric Company EDTV recording apparatus
US5208620A (en) * 1988-10-04 1993-05-04 Canon Kabushiki Kaisha Display apparatus
JPH02156785A (ja) * 1988-12-08 1990-06-15 Sony Corp 信号伝送装置
MY108674A (en) 1990-03-07 1996-10-31 Thomson Brandt Gmbh Television transmission system
ATE140577T1 (de) * 1990-04-18 1996-08-15 Thomson Brandt Gmbh Verfahren und vorrichtung zur bildsignal- aufzeichnung und/oder -wiedergabe
US5229847A (en) * 1991-07-12 1993-07-20 General Electric Company Television signal processing system including modulated auxiliary carrier

Also Published As

Publication number Publication date
DE59203303D1 (de) 1995-09-21
EP0579645A1 (fr) 1994-01-26
DE4111979A1 (de) 1992-10-15
JPH06506576A (ja) 1994-07-21
US5517252A (en) 1996-05-14
WO1992019075A1 (fr) 1992-10-29
EP0508333A1 (fr) 1992-10-14
ES2078040T3 (es) 1995-12-01
HK113396A (en) 1996-07-05

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